Back to EveryPatent.com
United States Patent | 5,785,425 |
Buchanan | July 28, 1998 |
A Portable Fluid Boiling Point Sensing Device (1) which can be used to measure the boiling point of fluids. The device includes a probe (2) for immersion in fluid to be tested, in particular in fluid reservoir. The probe (2) comprises a casing (2a) defining a chamber (3) for a semi-encapsulated portion of fluid (3a). The fluid (3a) kept at an optimum level without sensitive probe (2) depth measurement by a quantity of air (4) being trapped above an aperture means (6a) on the casing (2a) causing an artificial fluid level (L.sub.1) to be maintained below the surface of the test fluid. A heater (8) and a temperature sensor (9) are present in the housing (2a) and apertures (5, 6a, 6b) are provided to permit fluid flows into and from the chamber (3). The device senses the boiling temperature of the fluid by measuring the temperature of the vapors (11) given off the heated fluid (3a) within the housing (3), or alternatively directly from the fluid (FIG. 5a/b).
Inventors: | Buchanan; Nigel Alexander (Beechtree Cottage, New Gilston, by Leven, Fife, KY8 5IF, GB) |
Appl. No.: | 704532 |
Filed: | December 9, 1996 |
PCT Filed: | March 13, 1995 |
PCT NO: | PCT/GB95/00543 |
371 Date: | December 9, 1996 |
102(e) Date: | December 9, 1996 |
PCT PUB.NO.: | WO95/24646 |
PCT PUB. Date: | September 14, 1995 |
Mar 11, 1994[GB] | 9404701 |
Current U.S. Class: | 374/16; 374/25 |
Intern'l Class: | G01N 025/08 |
Field of Search: | 374/16,27,45,50,57,147,148,164,170,208 73/61.43,61.76 |
1443537 | Jan., 1923 | Hortvet | 374/16. |
3276262 | Oct., 1966 | Sapoff et al. | 374/27. |
3940988 | Mar., 1976 | Reed | 374/148. |
4781469 | Nov., 1988 | Turon-Lagot | 374/27. |
4958937 | Sep., 1990 | Lohberg et al. | 374/16. |
4987749 | Jan., 1991 | Baier | 374/148. |
5380091 | Jan., 1995 | Buchanan | 374/16. |
Foreign Patent Documents | |||
2338489 | Aug., 1977 | FR. | |
WO9012311 | Oct., 1990 | WO. |